Aren't most people running LVM where you can just add a new LUN, pvcreate and vgextend?
Kevin -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Finnur Örn Guðmundsson Sent: Thursday, July 24, 2008 10:32 AM To: Red Hat Enterprise Linux 5 (Tikanga) discussion mailing-list Subject: Re: [rhelv5-list] RE: multipathing in RHEL5 Howdy, I totally agree.....why on earth has this not been looked more into !....i would say this would be a very useful feature for anyone running his RHEL system of a SAN storage system..... Bgrds, Finnur Domenico Viggiani wrote: > I follow dm-devel mailing list and it seems that there was no improvements. > Sincerely, I think that online resizing is crucial for enterprise storage > systems. > > > >> -----Original Message----- >> From: [EMAIL PROTECTED] >> [mailto:[EMAIL PROTECTED] On Behalf Of Pasi Kärkkäinen >> Sent: Thursday, July 24, 2008 2:17 PM >> To: Red Hat Enterprise Linux 5 (Tikanga) discussion mailing-list >> Subject: Re: [rhelv5-list] RE: multipathing in RHEL5 >> >> On Mon, Jul 21, 2008 at 06:46:47PM +0200, Domenico Viggiani wrote: >> >>> It seems that online resizing of a multipath device is >>> >> actually impossible: >> >>> http://www.redhat.com/archives/dm-devel/2007-August/msg00205.html >>> >>> >> Hmm.. is this still the case nowadays? :( >> >> Anyone working on getting this fixed? >> >> -- Pasi >> >> >>> This is my personal offline how-to: >>> # Rescan devices (for all 4 paths) >>> echo "1" > >>> /sys/bus/scsi/drivers/sd/<h>\:<b>\:<t>\:<l>/block/device/rescan >>> ... >>> # Check /var/log/messages >>> # Trespass LUN by Navisphere >>> # Rescan devices (for all 4 paths) >>> echo "1" > >>> /sys/bus/scsi/drivers/sd/<h>\:<b>\:<t>\:<l>/block/device/rescan >>> ... >>> # Check /var/log/messages >>> # Umount filesystem >>> # Deactivate VG >>> vgchange -an vg_LUN >>> # Delete and recreate multipath device multipath -F multipath -v2 >>> multipath -ll # Activate VG vgchange -ay vg_LUN # Remount >>> >> filesystem # >> >>> Extend PV pvresize /dev/mapper/<long-multipath-identifier> >>> # Check VG >>> vgdisplay -v vg_LUN >>> # Extend LV >>> lvextend -l +256 /dev/vg_LUN/lvol... >>> # Extend FS >>> ext2online /dev/vg_LUN/lvol... >>> >>> Alternatively, you can create an additional LUN and add it to the VG >>> (online) >>> >>> If someone is able to find a better method, please post it! >>> >>> -- >>> Domenico Viggiani >>> >>> >>> >>>> -----Original Message----- >>>> From: [EMAIL PROTECTED] >>>> [mailto:[EMAIL PROTECTED] On Behalf Of >>>> >> Collins, Kevin >> >>>> [Beeline] >>>> Sent: Monday, July 21, 2008 6:31 PM >>>> To: Red Hat Enterprise Linux 5 (Tikanga) discussion mailing-list >>>> Subject: RE: [rhelv5-list] RE: multipathing in RHEL5 >>>> >>>> What about if the LUN is an LVM physical volume (PV) already? >>>> Can you use pvresize? >>>> >>>> Thanks, >>>> >>>> Kevin >>>> >>>> -----Original Message----- >>>> From: [EMAIL PROTECTED] >>>> [mailto:[EMAIL PROTECTED] On Behalf Of Domenico >>>> Viggiani >>>> Sent: Monday, July 21, 2008 1:28 AM >>>> To: 'Red Hat Enterprise Linux 5 (Tikanga) discussion mailing-list' >>>> Subject: [rhelv5-list] RE: multipathing in RHEL5 >>>> >>>> We are currently using native Red Hat multipath with an >>>> >> EMC Clariion >> >>>> CX700 disk-array. No problem at all, you need only to be >>>> well-disciplined and methodical with creating/destroying >>>> >> LUNs. Only >> >>>> real BIG problem is that you cannot resize a LUN online >>>> >> (unless you >> >>>> add PV to an existing VG, using LVM). >>>> >>>> Bye >>>> -- >>>> Domenico Viggiani >>>> >>>> >> _______________________________________________ >> rhelv5-list mailing list >> [email protected] >> https://www.redhat.com/mailman/listinfo/rhelv5-list >> >> > > > _______________________________________________ > rhelv5-list mailing list > [email protected] > https://www.redhat.com/mailman/listinfo/rhelv5-list > _______________________________________________ rhelv5-list mailing list [email protected] https://www.redhat.com/mailman/listinfo/rhelv5-list _______________________________________________ rhelv5-list mailing list [email protected] https://www.redhat.com/mailman/listinfo/rhelv5-list
